Kokila Vrat is dedicated to Maa Sati and Lord Shiva. On the full moon date of Ashadh month, Kokila fast begins which ends on Shravan Purnima. Kokila Vrat is celebrated by women all across the country on Ashadha Purnima. It is believed that one who observes this auspicious day with utmost devotion will remain committed to her marriage forever.